Added HTTP cache control to Channel, with a default to ignore cache for direct requests.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/DotNetOpenAuth/Messaging/Channel.cs b/src/DotNetOpenAuth/Messaging/Channel.cs
index 4c07f80..e70e5d6 100644
--- a/src/DotNetOpenAuth/Messaging/Channel.cs
+++ b/src/DotNetOpenAuth/Messaging/Channel.cs
@@ -14,6 +14,7 @@ namespace DotNetOpenAuth.Messaging {
 	using System.IO;
 	using System.Linq;
 	using System.Net;
+	using System.Net.Cache;
 	using System.Text;
 	using System.Threading;
 	using System.Web;
@@ -73,6 +74,11 @@ namespace DotNetOpenAuth.Messaging {
 		private List<IChannelBindingElement> incomingBindingElements = new List<IChannelBindingElement>();
 
 		/// <summary>
+		/// Backing store for the <see cref="CachePolicy"/> property.
+		/// </summary>
+		private RequestCachePolicy cachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.NoCacheNoStore);
+
+		/// <summary>
 		/// Initializes a new instance of the <see cref="Channel"/> class.
 		/// </summary>
 		/// <param name="messageTypeProvider">
@@ -139,6 +145,21 @@ namespace DotNetOpenAuth.Messaging {
 		}
 
 		/// <summary>
+		/// Gets or sets the cache policy to use for direct message requests.
+		/// </summary>
+		/// <value>Default is <see cref="HttpRequestCacheLevel.NoCacheNoStore"/>.</value>
+		protected RequestCachePolicy CachePolicy {
+			get {
+				return this.cachePolicy;
+			}
+
+			set {
+				ErrorUtilities.VerifyArgumentNotNull(value, "value");
+				this.cachePolicy = value;
+			}
+		}
+
+		/// <summary>
 		/// Sends an indirect message (either a request or response) 
 		/// or direct message response for transmission to a remote party
 		/// and ends execution on the current page or handler.
@@ -645,6 +666,7 @@ namespace DotNetOpenAuth.Messaging {
 			var fields = serializer.Serialize(requestMessage);
 
 			HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(requestMessage.Recipient);
+			httpRequest.CachePolicy = this.CachePolicy;
 			httpRequest.Method = "POST";
 			httpRequest.ContentType = "application/x-www-form-urlencoded";
 			httpRequest.Headers[HttpRequestHeader.ContentEncoding] = PostEntityEncoding.WebName;